code: def test_tangent_simplex_to_sphere(
      self, tangent_vec, base_point, expected, atol
  ):
      res = self.space.metric.tangent_simplex_to_sphere(
          tangent_vec, base_point
      )
      self.assertAllClose(res, expected, atol=atol)
  
imports: import pytest
  import geomstats.backend
  from geomstats.test.vectorization import generate_vectorization_data
  from geomstats.test_cases.geometry.base import LevelSetTestCase
  from geomstats.test_cases.geometry.riemannian_metric import RiemannianMetricTestCase
  from geomstats.test_cases.information_geometry.base import InformationManifoldMixinTestCase
label_desc: Use image node_id 8 for calling the MultinomialMetricTestCase obj's underlying member method code with example usage: obj.test_tangent_simplex_to_sphere(tangent_vec, base_point, expected, atol) without return types